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Communications Infrastructure

As 4G and 5G networks expand worldwide, designers of radio, computing, and networking equipment must deliver high data rates, low latency, and reliability in all environments.

Littelfuse offers a broad and deep portfolio of energy-efficient solutions that are dependable, affordable, and easy to incorporate into compact designs.


Safety & security

Protecting sensitive business and personal information from unauthorized access.

Reliability

Enabling cell towers and antennas to withstand extreme temperatures, humidity, noise, and interference from nature.

Increased demand

Upgrading global communication infrastructure for wireless data with 5G buildout and continued 4G expansion.

Power efficiency

Using the same or less power while still providing enhanced communication capabilities.

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The Littelfuse Difference

With our history of leadership in the telecom industry, we’re uniquely positioned to innovate future-focused communications infrastructure solutions that fit your application’s specific needs. We offer:

  • Application expertise and design guidelines
  • A comprehensive product portfolio
  • Robust testing capabilities
  • Assistance with standards compliance
  • Responsive sales support

Communications Infrastructure Applications and Products

Cellular base stations and small cells link the wireless signals to the wired telecommunication network.

Cell Tower with Active Antenna
Success
Success
Purpose Technology Solutions

Overcurrent
protection

Fuse

1
      
4
881 Series
TLS Series
606 Series

Surge
protection

TVS Diode

1
LTKAK10 surface mount high power TVS diode
HMOV Series
LV UltraMOV  Series
CG4 Series

Surge
protection

MOV

2
      
3
C-III Series
AK1-Y Series

Overcurrent
protection

Fuse

3
L17T Series
PSR
JLLS

Temperature
sensors

Thermistor

1
      
4
RA Series
RB series
KR series
LR series

Surge
protection

MOV

4
LV UltraMOV

Surge
protection

SIDACtor

4
Pxxx0SD

Active antenna units transmit or receive radio signals. They also provide a conversion of the radio signal to a baseband signal for use by the baseband unit.

Integrated Active Antenna
Success
Success
Purpose Technology Solutions

Overcurrent
protection

Fuse

1
881 series surface mount fuses
TLS Series

Surge
protection

TVS Diode

1
LTKAK10 surface mount high power TVS Diode

Overcurrent
protection

PTC

2
      
3
SMD Series

Surge
protection

SIDACtor

2
SEP Series

ESD & Surge
protection

TVS Diose
Array

2
SP3400

ESD
protection

TVS Diode

3
SMCJ
SMDJ

ESD
protection

Polymer ESD
suppressor

4
XGD Series

Baseband units convert communication signals from the telecom network into a format usable by the remote radio or active antenna

Baseband Unit (BBU) Block Diagram
Success
Success
Purpose Technology Solutions

Overcurrent
protection

Fuse

1
456 Series

Surge
protection

MOV

1
LV UltraMOV Series
TMOV
SM7
SMDJ
AK1-Y series
5.0SMDJ
8.0SMDJ
Pxxx0SD

Temperature
sensors

Thermistor

1
RA Series
RB series
KR series
LR series

ESD
protection

TVS Diode

4
SMDJ Series

ESD & Surge
protection

TVS Diode
Array

2
SP3010

ESD & Surge
protection

TVS Diode
Array

3
SRV05-4

Network switches provide a connection point for wired devices to communicate with each other. They can provide a connection of the telecom network to baseband units, servers, or routers.

Networking and Data Port Solutions
Success
Success
Purpose Technology Solutions

Overcurrent & 
overtemperature 
protection

PTC

1
1206L150SLYR Surface Mount PTC

ESD protection
on Vbus

TVS Diode
Array

2
SP1003 TVS Diode Array

ESD protection
on data lines

TVS Diode
Array

3
SESD1103 TVS Diode Array

Overcurrent
protection

Fuse

4
461 series Telelink surface mount fuse

ESD and surge
protection

TVS Diode
Array

5
SRV05-04HTG-D TVS Diode Array

ESD and surge
protection

TVS Diode
Array

6
SP1004U-ULC-04UTG TVS Diode Array

The power supply converts, cleans, stabilizes, and distributes utility power so that it can be used by the cellular communication equipment.

Power Supply Unit
Success
Success
Purpose Technology Solutions

Surge
protection

Varistor

1
UltraMOV Series
AK3 series TVS Diode
CG series GDT
Pxxx0SDT + LA Series

Overcurrent
protection

Fuse

1
505 Series Cartridge Fuse 
487 Series
606 Series
PSR Series

Rectifier

Rectifier
module

2
      
4
MDD
VUO
MDM

Power Factor
Correction

IGBT

2
      
4
XPT series
Ultra junction X-Class MOSFET

Control power
semiconductor

Gate Driver

2
      
3
      
4
      
5
IXD_6xx

Surge
protection

TVS diode

2
SMDJ surface mount TVS diode

Inverter

IGBT module

3
      
5
MIXA
MIXG
LSIC1MO SiC MOSFET

Rectifier

Rectifier
diode

5
DSE
LSIC2SD

Feedback
controls

Linear error
amplifier

6
LIA 130

Overcurrent
protection

Fuse

5
881 series SMD Fuse
TLS series
881F series
456 series
protecting-highway-cloud

Protecting The Highway to the Cloud

Because a growing percentage of both business and personal information is stored in the cloud, it’s more important than ever to ensure fast, reliable access to this information. Learn how G.fast makes economical high-speed connectivity possible.

Communications Infrastructure Application Notes

protecting-highway-cloud

Ethernet Design Guide

Find the most appropriate circuit protection components for Ethernet-equipped applications with the help of our 34-page design guide. It describes categories of Ethernet (including PoE - Power over Ethernet) and presents example circuits, applicable standards, and recommended components.

Contact Us Today

Tell us  about your projects and challenges. We’ll explore solutions with you.